Half a decade after the installment on ASU’s Tempe campus of the carbon capture system called the Mechanical Tree — developed by Klaus Lackner through the work of ASU’s Center for Negative Carbon Emissions, which he directs — the technology is seen as a playing a major role in efforts to protect the environment against the threats of climate change. ASU President Michael Crow talks about the success of Mechanical Tree systems and ASU’s plans to help develop ways to aid industry in adopting use of the technology and continuing to increase the amount of carbon that will be removed from the atmosphere. Lackner is a professor in the School of Sustainable Engineering and the Built Environment, part of the Fulton Schools.